Fluid-pressure regulator.



PATENTED FEB. 26, 1967.

L. B. FULTON. FLUID PRESSURE REGULATOR.

APPLICATION FILED OOT.1B, 1906.

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L. B. FULTON.

PATENTED FEB. 26, 1907:

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Louis B. FULTON, or PITTSBURG, PENNSYLVANIA; ASSIGNOR TO THE CHAPLIN-FULTON MANUFACTURING OOMPANY, OF PITTSBURG, PENN- sYLvA IA, A CORPORATION OF PENNSYLVANIA.

FLUID-PRESSURE REGULATOR.

Patented Feb. 26, 1907.

- To all whom it may concern.-

Pressure Regulators; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enable others skilled in the art to which it apper tains to make and use the same.

The primary object of this invention is to.

increase the area of the actuating-surface in a pressure-regulator Without increasing the diameter of the diaphragm-case, so that the device will be affected by even slight changes in the main on the delivery or low-pressure side of the regulator.

. It is well known in the art that the sensitiveness of a valve-controlling diaphragm is proportional to the efl'ective area thereof, and yet ,it is highly expedient that diaphragms of not too great diameter be employed, since, aside from the cost, diaphragms of large diameter are cumbersome to handle, take up unnecessary room, add to the weight and cost of shipment, and are My present invention overcomes all these difliculties, and I am enabled to obtain all the advantages that arise from the employment of a diaphragmof large diameter and atthe same time avoid any material increase inthe cost of manufacture.

The invention will be hereinafter fully set forth, and claims. t

In the accompanying drawings, Figure 1 is a vertical sectional view. Figs. 2 and 3 are similar views of modified forms of myinvention. 7

Referring to-the drawings, 1 designates the re lator-valve located in a gas-mam2, said va ve being shown as of the balanced type,

although any preferred form of construction n the may -be employed; The rod or stem 3 of this valve carries at its upper end a circular plate 4 located'ben'eath a diaphragm 5 withdiaph'ragmcasing or chamber 6; This casing is shown Fi .1 as being made in two parts, the uppe part being separated from the lower by a ring 7, fitted between the bolt-flanges 8, said parts and ring being held by the nutted bolts 9. The edge of the diaparticularly pointed out in. the' phragm 5 is secured between the ring and the lower part of the casing.

10 designates a second diaphragm located Within the diaphragm-casing and secured at its edge between the ring and the upper part of the casing. Against this diaphragm bears a circular plate 12 on the lower end of a rod or stem 13, extended through a tubular sleeve 14, fitted in a central opening in the top of the diaphragm-casing. The rod or stem 13 has an opening 15.formed therein coincident with opposite slots 16 in sleeve 14, and on said/sleeve are fitted the ring-like ends of a yoke 17. In this yoke is fulcrumed a lever 18, having a bulged or rounded por-.

tion 19, which fits snug within .the opening 15. -One arm of this lever has a weight 19*? thereon to balance the upper diaphragm and its cooperative parts,-so that such diaphragm will float and be sensitive to all changes in pressure.

I 20 designates a lever fulcrumed on the valve-housing beneath the diaphragm-casing, its short arm engaging the valve rod or stemfi, while its long arm is extended beyond the ed e of the diaphragm-casin and equipped wit a counterbalancing-weig t 21. Between its'counterweight and fulcrum this lever is connected by'a link 22 to the outer end of lever 18., A pipe leading from the low-gessure' side of the valve 0 ens into the diap agm casing between t e two diaphragms, said pipe being fitted in an opening 5 tends to seat .the regulator-valve as against the lifting action of the counterweighted lever 20, and likewise the upward movement of the diaphragm 10 tends, through lever 18 and link 22, to lift the. lever 20 to permit the regulator-valve to be seated. As the pressure falls, permitting the two diaphragms to move toward each other, the regulator-valve is opened, allowing an increased supply of 'gas. t

The iIIVGIItlOIl'lS capable of several mOdi-J fications. The two diaphragms need not be located in the same casing, nor need theyboth be arranged above the valve. In Fig.2 I

' have shown'the second diaphragm 10 as from the lower casing.

In Big. 3 I have shown the scond dia phragm located in a casing 6 bolted to the underside of the valve-casmg, the upper face of such diaphragm being subjected to the pressure on the lo'w-pressure'side of such valve.

By employing two diaphragms for acting on the counterweighted lever l insure the operation of the regulator-valve under all varying degrees of pressure, such diaphragms when of ordinary diameter being as sensitive to changes as a single dia hragm of an area equal to that of the two diaphragms. Thus I am enabled with great economy'in material and space to provide in a low-pressure regulator means for insuring the operation of the valve under all changes.

This application is filed in lieu of applicai tion Serial No. 303,532, filed February 28, 1906. i I

I claim as my invention 1 A pressure-regulator. comprising a valve having a rod or stem, a superposed diaphragm secured directly to such rod or stem, means normally tending to unseat such valve, and a second diaphragm in cooperative relation to the first-mentioned diaphragm, said diaphragmsbeing movable by'pressure from the low-pressure side of the valve, the movement of each diaphragm being communicated to the valve independently of the other diaphragm.

2. A pressure-regulator comprising a valve having a rod or stem, adiaphragm secured to such rod or stem, a second diaphragm, said diaphragms being movablein unison in oposite directions under pressure from the ow-pressure side of the valve, levers actuated by the movements of said diaphragms, and a connection between said levers.

3. A pressure-regulator comprising a valve,

a diaphragm connected thereto, means normally tending to unseat such valve, a second diaphragm, means operated thereby connected to the first-mentioned means, and a branch side of t e valve to the space between said diaphragms.

pipe leading from the low-pressure connection between said levers, and a branch pipe leading from the low-pressure side of the valve to the space between said diaphragms.

5. A pressure-regulator comprising a valve having a rod or stem, a diaphragm secured to such rod or stem, a second diaphragm also having a rod or stem, said diaphragms being movable in unison in opposite directions, levers engaging said rods orvstems, one lever having a counterbalancing-Weight normally tending to unseat such valve, a connection stem of said second diaphragm, a connection between said levers, and a branch pipe leading from the low-pressure side of the valve to the space between said diaphragms.

7. A pressure-regulator comprising a valve having a rod or stem, a two-part casing, a diaphragm secured to said rod or stem and fitted between the parts of the casing, a weighted lever normally tending to unseat such valve, a second diaphragm also secured between said parts of the casing, and having a rod or stem, a second lever engaging said latter rod or stem, means connecting said'levers, and a branch pipe leading from the low-pressure side of the valve to the space between said diaphragms. p

8. A pressure-regulator comprising a valve having a rod or'stem, a two-part casing having bolt-flanges, a ring held between said flanges, a diaphragm secured to said rod or stem and fitted between said ring and the lower casing part, a weighted lever tending to normally unseat such valve, a second diaphragm secured between said ring and said upper casing part, a second lever engaging said rod or stem, means connecting said levers, and a branch pipe leading from the lowpressure side of thevalve to the space between said diaphragms.

- 9. A fluid-pressure regulator comprising a valve, having a rod or stem, a diaphragm se-' cured to such rod or stem, a second diaphragm, means for balancing such second diaphragm, said diaphragms being movable in unison in opposite directions under pressure from one side of the valve, and means actuated by the movements of said diaphragms for effecting the seating of said valve when said diaphragms move in opposite directions.

10; A fluid-pressure regulator comprising a valve having a rod or stem, a diaphragm secured to such rod or stem, a segond diaphragm also having a rod or stem, said dish In testimdny whereof I have signed this ph'ragms being movable in unison in opposite specifieation in the presence of two subsribr0 direct-ion a, wgightedgeger ingaging the mg I ing witnesses. a

' or'stem o sai seeon iap agm, a secon 5 weighted lever engaging the valve-rod, a con-' F nection'between said levers, a.nd"a branch Witnesses:

pipe leading from one side of said valve to, CHARLES W. TOWNSEND, the space between said diaphragms. WM. C. CEAPLIN, 

